You are pushing a cart in grocery store at a constant velocity of 3.00 m/s in the straight ahead direction. A retail worker in a hurry rushes by and accidentally shoves the cart with a force of 17 N directly to the right. You immediately supply a counter force to keep the cart rolling in the ORIGINAL (straight ahead) direction. What force (magnitude and direction) did you supply to keep the cart moving straight ahead? You should not need to do any calculation for this problem.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

If your workout exceeds an hour you should substitute "a sports drink" for water.hope my answer has you : )